Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/SelectedDatesCollection.cs

@@ -0,0 +1,177 @@
+//------------------------------------------------------------------------------
+// <copyright file="SelectedDatesCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;
+
+    /// <devdoc>
+    /// <para>Encapsulates the collection of <see cref='System.Web.UI.WebControls.Calendar.SelectedDates'/> within a <see cref='System.Web.UI.WebControls.Calendar'/> control.</para>
+    /// </devdoc>
+    public sealed class SelectedDatesCollection : ICollection {
+
+        private ArrayList dateList;
+
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.Web.UI.WebControls.SelectedDatesCollection'/> class 
+        ///    with the specified date list.</para>
+        /// </devdoc>
+        public SelectedDatesCollection(ArrayList dateList) {
+            this.dateList = dateList;
+        }
+
+
+        /// <devdoc>
+        ///    <para>Gets the item count of the collection.</para>
+        /// </devdoc>
+        public int Count {
+            get {
+                return dateList.Count;
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Gets a <see cref='System.DateTime' qualify='true'/> referenced by the specified ordinal index value in the collection.</para>
+        /// </devdoc>
+        public DateTime this[int index] {
+            get { 
+                return(DateTime) dateList[index];
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Adds the specified <see cref='System.DateTime'/> to the end of the collection.</para>
+        /// </devdoc>
+        public void Add(DateTime date) {
+            int index;            
+            if (!FindIndex(date.Date, out index)) {
+                dateList.Insert(index, date.Date);
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Removes all <see cref='System.DateTime'/> controls from the collection.</para>
+        /// </devdoc>
+        public void Clear() {
+            dateList.Clear();
+        }
+
+
+        /// <devdoc>
+        ///    <para>Returns a value indicating whether the collection contains the specified 
+        ///       date.</para>
+        /// </devdoc>
+        public bool Contains(DateTime date) {
+            int index;            
+            return FindIndex(date.Date, out index);
+        }
+
+
+        /// <devdoc>
+        /// </devdoc>
+        private bool FindIndex(DateTime date, out int index) {
+            int n = Count;            
+            int Min = 0;
+            int Max = n;
+            while (Min < Max) {
+                index = (Min + Max ) / 2;
+                if (date == this[index]) {
+                    return true;
+                }
+                if (date < this[index]) {
+                    Max = index;
+                }
+                else {
+                    Min = index + 1;
+                }
+            }
+            index = Min;
+            return false;
+
+        }
+
+
+        /// <devdoc>
+        /// <para>Returns an enumerator of all <see cref='System.DateTime' qualify='true'/> controls within the collection.</para>
+        /// </devdoc>
+        public IEnumerator GetEnumerator() {
+            return dateList.GetEnumerator();
+        }
+
+
+        /// <devdoc>
+        /// <para>Copies contents from the collection to a specified <see cref='System.Array' qualify='true'/> with a 
+        ///    specified starting index.</para>
+        /// </devdoc>
+        public void CopyTo(Array array, int index) {
+            for (IEnumerator e = this.GetEnumerator(); e.MoveNext();)
+                array.SetValue(e.Current, index++);
+        }
+
+
+        /// <devdoc>
+        ///    <para>Gets the object that can be used to synchronize access to the collection. In 
+        ///       this case, it is the collection itself.</para>
+        /// </devdoc>
+        public Object SyncRoot {
+            get { return this;}
+        }
+
+
+        /// <devdoc>
+        ///    <para>Gets a value indicating whether the collection is read-only.</para>
+        /// </devdoc>
+        public bool IsReadOnly {
+            get { return false;}
+        }
+
+
+        /// <devdoc>
+        ///    <para>Gets a value indicating whether access to the collection is synchronized 
+        ///       (thread-safe).</para>
+        /// </devdoc>
+        public bool IsSynchronized {
+            get { return false;}
+        }
+
+
+
+        /// <devdoc>
+        ///    <para>Removes the specified date from the collection.</para>
+        /// </devdoc>
+        public void Remove(DateTime date) {
+            int index;            
+            if (FindIndex(date.Date, out index)) {
+                dateList.RemoveAt(index);
+            }
+        }
+
+
+        /// <devdoc>
+        /// <para>Sets the contents of the <see cref='System.Web.UI.WebControls.SelectedDatesCollection'/> to span
+        ///    across the specified date range.</para>
+        /// </devdoc>
+        public void SelectRange(DateTime fromDate, DateTime toDate) {
+            dateList.Clear();
+            if (fromDate <= toDate) {
+                // The while loop below is safe that it is not attempting to add
+                // day beyond the last supported date because toDate can happen
+                // to be the last supported date.
+                dateList.Add(fromDate);
+                DateTime date = fromDate;
+                while (date < toDate) {
+                    date = date.AddDays(1);
+                    dateList.Add(date);
+                }
+            }
+        }
+    }
+}